Sewing-machine.



E. E. WINKLEY. SEWING MACHINE. APPLICATION FILED JULY 11, 1906. 1,091,101, Patented Mar. 24, 1914.

7 SHEETS-SHEET 1.

E. B. WINKLEY. SBWING' MAQHINE. APPLICATION FILED JULY 11, 1906. 1,091,101. Patented Mar. 24, 1911 7 SHEETS-SHEET 2.

li c o Zjfizessas I fiwezzzbr" E. E. WINKLBY.

SEWING MACHINE.

APPLICATION FILED JULY 11, 1906.

. Patented Mar. 24, 191i 7 SHEETS-SHEET 3.

E. E. WINKLEY. SEWING MACHINE. APPLICATION FILED JULY 11. 1900.

Patented Mar. 24, 1914.

7 SHEETS-SHEET 4.

E. E. WINKLEY.

SEWING.-MAGHINE.

APPLICATION FILED JULY 11. 1906.

LOQLlOl. Patented Mar. 24, 1914 7 SHEETS-SHEET 5.

AW Kama m E. E. WINKLEY.

SEWING MACHINE.

APPLICATION FILED JULY 11, 1906. 1,09l,1 O1

Patented M11224, 1914.

7 SHEETS-SHEET s.

1 O \H- 1 1. Z

LQ9L101.

E. E. WINKLEY.

SEWING MACHINE.

APPLICATION FILED JULY 11, 1906.

Patented Mar. 24, 191i 7 SHEETS-SHEET 7.

ERASTUS E. WINKILEY, or LYNN, massacnusnr'rs.

snwmo-maonmn.

To all whom cit-may camera Be it known that I, ERASTUS E. WINKLEY,

a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Sewing-Ma- ..chines; and I i do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in sewing machines and particularly to improvements in Wax-thread shoe sewing machines which employ a hook needle. The object of the invention is to provide a wax-thread shoe sewing machine with a stop device which will not interfere with or modify the action of the thread handling devices in forming a stitch during the normal operation of the machine and which will act efiiciently and with certainty to stop the machine automatically immediately upon the occurrence of a mis-stitch resulting from the breaking or the exhaustion of the thread or the mis-looping of the needle or the failure of any of the sewing instru- -mentalities to' properly perform its function.

The invention is particularly designed for use In sewing machines of the class above referred to provided with automatic devicesfor holding and guiding the work although it is not limited to such use but may be used to advantage in other types of wax-thread shoe sewing machines which employa hook needle.

With the above object in'view the present invention contemplates the provision in a wax-thread shoe sewing machine of a stop device which is controlled in its operation by a member forming a part of the thread controlling mechanism. which member engages and is controlled in its movement by the thread.

Broadly considered the invention contemplates the use of any movable member of a suitable thread controlling mechanism which is arranged to control the stop device. It is preferred, however, to use the ordinary springpressed auxiliary take-up to control the operation of .the stop device which auxiliary take-up is moved automatically by the thread during the stitch forming operation and changes its position as the tension on the thread between the work and v Specification of Letters Patent. Application filed m 11, 1906. Serial No. 325,567.

Patented Mar. 24, 1914.

the tension device varies during the opera- .tion upon the stitch. By the provision of a StOP IIIQChHHlSHI which is controlled in its operation by the auxiliary take-up a simple and eflicient construction is produced which embodies no part arranged to engage the thread in addition to the usual thread handling devices. A still more important advantage secured by the provision of a stop mechanism controlled by the auxiliary takeup is that no extra tension is placed upon the thread at any time during the formation of a stitch and the thread handling and controlling devices are not interfered with in any way.

In addition to the broad features of invention above referred to the present inven-' tion also consists in the improved devices, combinations and arrangements of parts hereinafter described and claimed, the advantages'of which will be obvious to those skilled in the art.

In the drawings Figure 1 is a general side elevation of a machine embodying the present invention; F ig. 2 is a right-hand side elevation of the stitch-forming mechanism and a portion of the stop device; Fig. 3 is a plan view of a portion of the stop device including the valve actuating mechanism and the adjacent parts of the stitch-forming mechanism; Fig. 4 is a left hand side elevation of the stitch-forming mechanism and parts of the stop device; Fig. 5 is a detail of Fig. l, illustrating the position of the jar-arts when the thread breaks and the stop c evice operates; Fig. 6 is a detail front elevation showing the can] and the valve lever for operating the pneumatic valve; Fig. 7 is a detail sectional view illustrating the construction of the pneumatic valve; Fig. 8 1s a sectional plan view of the lower portion of the machine, showing the mechanism for starting and stopping the stitch-forming mechanism; Figs. 9, 10 and 11 are detail views showing the treadles and the trip. mechanism for starting and stopping the machine, in right hand elevation, left hand side elevation, and front elevation, respectively. Fig. 12 is a detail side elevation of the pneumatic cylinder and its assoclated mechanism;-Fig-. 13 is a detail end elevation ,of-the pneumatic cylinder and its associated mechanism, and Fig. 14 is a detail sectional view on the line tie- 412 FigQlQ looking from the right,

The invention is illustrated as embodied in an automatic sewing machine for operating upon last-ed boots and shoes, the machine be provided, in addition to the stitch-forming mechanism, with automatic mechanism for holding and guiding a lasted. shoe, whereby the constant attendance of an operative is obviated, and the stop device of the present invention is embodied in the machine to cause it to stop automatically in the absence of the operative when breakage or exhaustion of the thread or misloopin of the hooked needle of the sewing mac line causes astitch to be missed or improperly formed. The general construction and mode of operation of the machine of the drawings form no part of the present invention except in combination with the stop device and need not be particularly de scribed in this application, except in so far as is necessary for an understanding or the invention. This machine forms the subject matter of a co-pending application of the present inventor filed February 17, 1906, Serial No. 301,578.

The stitch-forming mechanism, indicated generally by the reference character 1, Fig. 1, and the automatic jack 2, are mounted upon a frame 3, in which is journaled the power shaft 4, driven by a pulley 5, by which the machine is actuated. The power shaft 4: rotates continuously, and the stitchforming mechanism and the other mecha'- nisms of the machine are thrown into and out of operation at suitable times by clutches connecting them with the power shaft. The clutch for driving the stitch-forming mechanism comprises a disk 6 fixed to the power shaft and a clutch member 7 mounted to rotate and move longitudinally on the power shaft and carrying a pulley 8. The pulley is connected by a belt 9 with a'double pulley 10 journaled on the upper portion of the machine, and the pulley 10 is connected by a belt 11, passing over guide rolls 12, with the driving pulley 13 of the stitchforming mechanism. The pulley 13 is connected by a sprocket chain, as shown in Fig. 1, with the cam shaft 14 carrying the cams by which the stitch-forming instrumentalities are directly actuated. By moving the clutch memher 7 along the power shatt it may be made to engage ordisengage the clutch disk 6 so I as to start or stop the operation of the stitchforming mechanism. The clutch is operated in this manner by means of a forked arm 15 engaging a groove 16 in the clutch member and fixed to a rock shaft 17 mounted in fixed journals. The rock shaft (see Figs. 8 and 14) carries an upwardly-extending arm 18 loosely embracing at its upper end a rod 19 carrying a fixed collar 20 between which and the arm 18 a coiled spring 25 is inter posed. The rod 19 extends to the front of the machine and is pivotally connected with a tr'e'adle lever 21 pivoted at 22 on the frame of the machine. lVhen a shoe has been placed in position on the jack the operator depresses the treadle lever 21, thereby drawing forward the rod 19, which operates, through the'connections above described, to draw the clutch members into contact and startthe operation of the stitch-forming mechanism. The clutch is maintained thereafter in its operative position by a detent 23 engaging at its lower end a lug 25 on the treadle lever 21. The detent 23 is mounted on a rock shaft 24, journaled in the frame of the machine and carrying an upright arm 26 connected by a link 27 with a lever 28 pivoted at 29 on the frame of the machine. The lever 28 has a projection 30 in position to be engaged by a projection 31 on a cam 32 fixed to the cam shaft 33 by which the automatic mechanism of the machine is actuated. The cam shaft 33 makes one revolution during the sewing of a shoe, so that when the sewing operation is completed a projection 31 engages the projection 30, moves the lever 28 to the right and thereby swings the detent 23 backward so as to release the treadle lever 21.

During the normal operation of the machine, it continues to sew the shoe until it is automatically stopped by the mechanism above described when the sewing of the shoe has been completed. In the illustrated embodiment of the present invention the stop device is arranged to trip the detent 23 and permit the clutch to be thrown out at any time during the operation upon the shoe. In arranging the stop device to operate upon a mislooping or breaking of the thread advantage is taken of the fact that during the normal operation of the machine the thread is maintained constantly under tension, whereas upon breakage or mislooping the tension upon the thread is relaxed, and thus the stop device can be controlled in its operation by a member engaging the thread and controlled thereby, the position of such member depending upon the tension of the thread. In the illustrated embodiment of the invention no additional member is applied to the machine for this purpose, but the stop mechanism is made to cotiperate with the ordinary spring-pressed auxiliary take-up, which forms a part of the stitchforming mechanism.

The stitch-forming mechanism (shown particularly in Figs. 2 and 4) is in eneral substantially like that of the well-mown Goodyear welt and turn shoe-sewing ma-. chine, and comprises the usual curved hook needle 34, looper 35, take-up 36, and auxiliary take-up 37 the latter being pivoted at 38 on the frame of the machine and maintained in engagement with the thread by a sprin 39 (Fig. 3) engaging an upwardlyexten ing lug 40 on t e auxiliary take-up. The feed point and channel guide and their "in Fig. 6,

actuating mechanism are omitted from the drawings for the sake of clearnes's. At each retracting stroke of the needle the slack thread held by the auxiliary take-up is drawn off by the needle, so that the auxiliary take up is raised to the position of Fig. l. If, however, the looper has failed to properly lay the thread on the needle, or if the thread breaks the tension upon the thread is relaxed and the auxiliary take-up, under the influence of the spring 39, falls to the position of Fig. 5. A push rod 41 (Figs. 3, 4, and 5) is arranged to slide horizontally in an opening in the frame of the machine in position for its end to engage the lug l0 on the auxiliary takeup.. and 1s pivotally connected at 42 with an arm 43 on a vertical rock shaft 44 joi'u'naled on the frame of the machine. The rock shaft 44 carries at its upper end a cam lever -i5 carrying a cam roll 46 which engages a cam 47 mounted on the cam shaft 14:of the stitchforming mechanism. A s rin.g d8 connected with an arm 49 on the rock shaft 4A maintains the cam roll $6 in engagement with the cam. The cam lever carries at its rear end a. segmental. ram 50 which engages, as shown in Figs. t and 7, the upper end of a valve plunger 51 forming part of a pneumatic valve. The plunger 51 carries a piston 52 sliding in the valve cylinder 53. The valve provided with an inlet 54 for compressed air and with a passage 55 connecting it with a pneumatic cylinder which actuatr the mechanism for stopping the machine matically. The cam 4:7, as shown has a depression 56. and this depression is so located that at each rotation of rm shaft the depression comes oppocam roll 46 when the needle is in rei position, so that the cam lever 45 to J at this time to swing out under the infiuence of the spring 18 and to push the push rod t1 toward the auxiliary take-up. If the auxiliary take-up occupies its normal position at this time, however, the lug 40 arrests the movement of the push rod, and movement of the cam lever 45 is prevented; but if the auxiliary take-up is in the position of Fig. 5, owing to relaxation of tension on the thread, movement of the cam roll 46 occurs and the segmental cam 50 is moved to such position that the valve plunger 51 may be, and is, raised by a spring 57 connected with the lower end thereof, and compressed air is thus admitted to the passage 55 and thence to the pneumatic cylinder, causing the auto-.

matic mechanism actuated thereby to disconnect the driving clutch and stop the machine.

The pneumatic cylinder 58 is mounted on the frame of the machine and provided with a piston 59 carrying a plunger 60 which bears against one arm 61 of a bell-crank lever pivoted upon a vertical stud 62 on the frame of the machine. Another arm 63 of the bell crank lever is pivoted to a rod 64 (Figs. 12, .15? and .14) which is pivoted at its forward end to the detent 23. Upon the admission of air to the pneumatic cylinder through the air pipe .55 the plunger 60 rocks the bell-crank lever, causing it to pull upon the rod 64: and trip the detent 23 so as to permit the clutch to be thrown out.

The mechanism above described operates to disconnect the sewing mechanism from the power upon a failure in the tensionof the thread, but it is desirable to stop the stitch-forming mechanism as quickly as possible upon such occurrence, and for this reason the machine is provided with a retarding device for bringing the stitch-forming mechanism quickly to rest. A brake shoe '65 is mounted upon an arm 66 fixed to a rock shaft 67 journaled on the frame of the machine and carrying an upright arm 68, which is connected, by a universal joint-69, with a link 70 jointed at its other end upon an upward extension 71 of the bell crank levver 61. The clutch member 7 carries a.

grooved brake-member 72 in position to be engaged by the brake shoe 65, and when the pneumatic cylinder is operated in the manner above described, swinging the bell crank lever 61 and disengaging the clutch, it oper-' ates simultaneouslyt'o apply the brake and quickly arrest the movement of the stitchforming mechanism.

In order that the brake may be applied when the machine is stopped during its normal operation in the manner above described without the operation of the pneumatic.

cylinder, the rod 19 is provided with a fixed lug 73 and a pin 74 is fixed in the arm 63 of the bell crank lever. When the rod 19 moves rearwardly to release the clutch the lug 73 engages the pin 74 and rocks the bell crank lever, thereby applying the brake. To permit the operator to stop the machine at any point in its operation the detent 23 is provided with a treadle 75 by which it may be released.

The operations of the above-described device have been set forth in connection with the foregoing description and need not be again described. It will beapparent that any failure in the thread tension, whether resulting from a mislooping of the needle.

which causes slack thread to be left between the last formed stitch and the thread supply, or by breakage of thread, which occurs usually at th hook of the needle, or by the exhaustion of the thread supply, will result in failure of the thread to draw the auxiliary take-up up to its normal position at the time when the needle occupies its retracted position, and will cause the stop device to act, and thus the machine is prevented, in the absence of the operator, from continuing to work after such an occurrence.

III

Although the invention has been described in connection with a machine for sewing shoes, provided with automatic devices for holding and guiding the work, it will be apparent that the invention may be used in connection with sewing machines of many other types performing work of difi'erent characters, particularly in machines of an automatic or semi-automatic character, that is, machines provided with automatic devices for guiding the work.

The invention is not limited in general to the details of construction and operation of the illustrated embodiment, but may be embodied in other forms broadly defined in the claims.

I claim 1. A wax thread shoe sewing machine having, in combination, stitch forming mechanism including a hooked needle, a stop device, and mechanism for controlling the 4 thread during the formation of a stitch including a spring pressed member operating independently of the stop device and en gaging, and controlled in its movement by, the thread, said stop device being controlled by said thread engaging member and operating automatically to stop the machine upon the failure of said member to occupy its normal position.

2. A wax thread shoe sewing machine having, in combination, stitch forming mechanism including a hooked needle, a stop device tending to operate at a certain point in each cycle of operations of the machine, and thread controlling mechanism including a spring pressed auxiliary take up operating independently of said stop device and acting during the normal operation of the machine to hold the stop device inoperative at the point in the cycle of operations at which said stop device tends to operate.

3. A wax thread shoe sewing machine having, in combination, stitch forming mechanism including a hooked needle, a stop de vice, thread cont-rolling mechanism including a spring pressed auxiliary take up operating independently of said stop device and acting at certain times during the operation of the machine to hold the stop device inoperative, anda cam for holding the stop device inoperative at other times.

4. A chain stitch wax thread shoe sewing machine having, in combination, stitch forming mechanism including a curved hooked needle, a main take up operating while the needle is in the work, a stop device operating automatically to stop the machine upon the occurrence of a mis-stitch, and a spring pressed auxiliary take up operating independently of said stop device, said stop device including a member arranged to be engaged by the auxiliary take up and held in inoperative position at certain times during the normal operation of the machine and to be released so as to move into operative position upon the occurrence of a mis-stitch.

5. A wax thread shoe sewing machine having, in combination, stitch forming mechanism, a clutch to connect said mechanism to a source of-power, mechanism for actuating said clutch to render it operative, a detent to hold the clutch in operation, mechanism acting automatically to trip the detent at the completion of sewing a shoe, and a stop device acting automatically to trip the detent upon the occurrence of a mis-stitch.

6. A chain stitch wax thread shoe sewing machine having. in combination, stitch forming mechanism including a curved hooked needle, and means operating automatically upon the occurrence of a mis-stitch to stop the machine with the needle in retracted position,

7. A wax thread shoe sewing machine having, in combination, stitch forming mechanism including a hooked needle,

thread controlling mechanism including a spring pressed auxiliary take up, and a stop device operating automatically to stop the machine upon'the occurrence of a mis-stitch, said stop device including a movable member and means for moving said'mcmber in termittently into engagement with the auxiliary take up.

8. A wax thread shoe sewing machine having, in combination, stitch forming mechanism including a hooked needle, thread controlling mechanism including a spring pressed auxiliary take up, and a stop device operating automatically to stop the machine upon the occurrence of a mis-stitch, said stop device including a push rod, :1 spring to move said rod into engagement with the auxiliary take up, and a cum to move said rod out of'engagement with the auxiliary take up.

In testimony whereof I aflix my signature, in presence of two witnesses.

ERASTUS E. WINKLEY.

Witnesses GRACE MOONEY, Gnomes T. HART, Jr. 

